Corner clamp for frames



Jan. 30, 1923. 17,443,578

C'. E.r KLI'NE. CORNER CLAMP FOR FRAMESy ,-fFLED APR'. 1. 11921:.'

31a/nemici Patented `lan., 3i), l923.

innere raras-'r orrica CHARLES E. KLINE, OF CEDAR SPRYILNGSVMICHIGAN.

CORNER CLAMP FOR FRAMES.

Application filed April 1,

To all yiff/710ml 'it may concern-J Ee it known that l, CHinLns.. liLiNn, a citizen oil the TJni'ted States. residing at Uedar Springs, in the county ot lient and State oit Michigan, have invented certain new and useful improvements in Corner @lamps tor l?v rames, ot which the following is a specification.

My invention relates to improvements in fastening devices 'for mitered corners, such as tor picture trame construction, box corners, and other lines oi corner construction, and its objects are: First, to provide a cheapl but effective means tor positively securing such corners; second, to provide a means wherewith such corners may be :uijusted to weer. any shrinkage ci the timber that may i ze place after construction; and, third, to provide a means whereby the mitered corner construction may be as permanent as an integral rorner could be.

l attain these objects by the mechanism and construction shown in the accompanying drawing, in which Fig. l is :in elevation ot one corner oi a frame with my appliance shown in outline. Fig. 2 is a like View showne trame in outline, and my implements lace therein but shown in solid lines. Y is a perspective ot my device, with the trame shown in outline. big. 4e is an edge elevation ot one corner oi, a trame with one part ot my device in place, showing the position ot' the securing bolt` and Fig. 5 is a bac plan of the clamping plate showing a modified :term ot resistance plate, or arm. t" i ar reference characters indicate similar parts throughout the several views.

ln the construction of this trame corner retainer l nialre use ot sheet metal strips or plates, each having a body portion, 2, and a right angled portion 3. l embed a metal body 2 in each of the 'frame members l, as indicated by the dotted lines, especially in Fig; l, but likewise indicated in Figs, 2 and 3, with the right angled arm 3 disposed in a n'iortise in trie trame member in such a position that bolt el, passing through the end ot one ot said plates, two being used. at each corner ot the trame, will pass into, and be screwed through the screw threaded hole in the arm 3 of the other plate so that the wood at the end or the members l of the trame, will be drawn solidly together, in both directions; that is in directions at right angles to each other` as plainly indicated in Fig. l, and as plainly shown in Figs. 2 and 1921. Serial No. 457,576.

3. ln Fig. 5, 5 represents the hole through the body 2 of the clamping plate, and in F ig. 3, 6 represents a like hole through the arm 3 that is screw threaded to receive the screw threaded end oi one of the bolts 4:.

l prefer that the points or ends of the bolts within the frame material l be made sharp, as at 7 in Fig'. 2, as by this means it is much easier to make them to enter and be screwed through the holes 6 in the arms 3, but they may be made of any desired or convenient form for ready application.

It is necessary, of course, for these plates to be so punctured, as at 5 and 6, that when the bolts 4 are in place they may pass each other, as shown in Figs. 2 and 3.

ln Figs. 1, 2 and 3 I have shown the arms 3 as made ot the sheet metal bent at right angles without further preparation, but with this form it is a little diflicult to form the mortise in the frame for the reception ot these arms, it being necessary t-o either bore several holes to obtain the proper width or length ot mortise, and to overcome this eXtra. work and loss of time I have provided for boring a single hole into the frame sides for the reception of the semicircular arm 3. I am somewhat prejudiced in -favor of this forni of arm as with its use a single hole, as hereinbe'tore intimated, will suiiice for the reception ot the arm, and, with this form a much greater' bearing surface is provided than it' the flat arm 3 is used, and the balance ot the hole may be filled with Wood, putty or other suitable material. It will be readily understood that this form of arm may be made upon an ordinary machine press, with the proper dies therefor.

Having thus fully described my invention, what l claim as new in the art, is:

l. A corner clamp for trame construction consisting` of a pair of plates and means for securing said plates together at right angles with each other at the corner of a frame, each plate comprising an apertured body portion and an apertured arm perpendicular thereto, the arm ot each plate being disposed opposite the body portion of theother plate, and the aperture in each plate being out of alinement `with the aperture in the other body portion but in alinement with the aperture in the opposite arm whereby the securing means may be passed through the apertures in therespective body portions and into the apertures in the opposite arms Without danger of either of said securing elements interfering With the other securing element.

2. A corner clamp for trame construction, Comprising a pair of' sheet metal plates adapted to be placedl upon the outer edges ot a corner of the frame7 each plat-e having an arm formed perpendicular thereto adapted to be set into av member of said frame and having a.v screw threaded hole through each arm, each'plate having' a hole through it near its plain end9 a bolt adapted to be passed through the hole in the plain end of each plete l(rnd screwed into the hole in the arm of the opposite plate to bind the members oit the frame rmly together at the corners of the frame.

3, ln treme construction, a corner clamp CHARLES E. HERNE. 

